TY - GEN
T1 - ML blind channel estimation in OFDM using cyclostationarity and spectral factorization
AU - Quadeer, A. A.
AU - Al-Naffouri, T. Y.
PY - 2010
Y1 - 2010
N2 - Channel estimation is vital in OFDM systems for efficient data recovery. In this paper, we propose a blind algorithm for channel estimation that is based on the assumption that the transmitted data in an OFDM system is Gaussian (by central limit arguments). The channel estimate can then be obtained by maximizing the output likelihood function. Unfortunately, the likelihood function turns out to be multi-modal and thus finding the global maxima is challenging. We rely on spectral factorization and the cyclostationarity of the output to obtain the correct channel zeros. The Genetic algorithm is then used to fine tune the obtained solution.
AB - Channel estimation is vital in OFDM systems for efficient data recovery. In this paper, we propose a blind algorithm for channel estimation that is based on the assumption that the transmitted data in an OFDM system is Gaussian (by central limit arguments). The channel estimate can then be obtained by maximizing the output likelihood function. Unfortunately, the likelihood function turns out to be multi-modal and thus finding the global maxima is challenging. We rely on spectral factorization and the cyclostationarity of the output to obtain the correct channel zeros. The Genetic algorithm is then used to fine tune the obtained solution.
KW - Blind channel estimation
KW - Genetic algorithm
KW - Maximum likelihood estimation
KW - Spectral factorization
UR - https://www.scopus.com/pages/publications/78751552089
U2 - 10.1109/SPAWC.2010.5671265
DO - 10.1109/SPAWC.2010.5671265
M3 - Conference Paper published in a book
AN - SCOPUS:78751552089
SN - 9781424469901
T3 - IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
BT - 2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2010
T2 - 2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2010
Y2 - 20 June 2010 through 23 June 2010
ER -